Had 3 on my left front for about a couple months because I popped a tire and Discount said one of the bolts got stripped when I put on the spare (it was 2:30 in the morning on a busy street and I was in a big hurry, and probably fucked something up) and the only way they could get it off was to cut it. Only became a problem when I went 70+. I could feel a slight vibration.
From what I've read, the rears are easy, but the fronts are a pain in the ass. Cost me $180 at Midas just to replace that one.